#define _CRT_SECURE_NO_WARNINGS

#include<stdio.h>

int main()
{
	int i = 5;
	int a[5] = { 11,11,2,2,3};
	int result = 0;
	for (i = 0; i < 5; i++)
	{
		result = result ^ a[i];
	}
	printf("result = %d", result);
	return 0;
}